Paper-bag machine.



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PATENTED MAR. 27, 1906.

P. E. STRASBURG. PAPER BAGMAGHINE.

APPLICATION FILED MAR.9, 1905.

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F. E. STRASBURG.

PAPER BAG MACHINE. APPLICATION HLBD MAILS, 1905.

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P. E. STRASBURG... PAPER BAG MACHINE.

APPLIGATION FILED MVAR.9,1905.

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orney PATENTED MAR. 27, 1906.

' P. E. STRASBURG.

PAPER BAG MACHINE. APPLICATION FILED MAR.9,1905.

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F. E. STRASBURG. PAPER BAG MACHINE. APPLICATION FILED MARA, 1905.

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No. 816,193. PATENTED MAR. 27, 1906.

F. E. STRASBURG.

PAPER BAG MACHINE.

APPLICATION FILED MAR.9,1905.

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PATENTED MAR. 27, 1906.

F. E. STRASBURG.

PAPER BAG MACHINE.

APPLIOATIQN FILED Mmm, 1905.

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No. 816,193. PATENTED MAR. 27, 1906.

' F. E. STRASBURG.

PAPER BAG MACHINE.

APPLIOATION FILED MAR.9, 1905.

9 SHEETS-SHEET 9.

Frederic/ E. Strasburg i0/ v 'zfnrlwy narran sums anni@ ornicn.

FREDERICK E. STRASBURG, OF RUMF ORD FALLS, MAINE, ASSIGNOR TOCONTINENTAL PAPER BAG COMPANY, A CORPORATION OF MAINE.

PAPER-BAG MACHINE.

Specification of Letters Patent.

Patented March 27, 1 906.

Application filed March 9, 1905. Serial No. 249,26 7.

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Be it known that I, FREDERICK E. STRAS- BURG, a citizen of the UnitedStates, residing at Rumford Falls, in the county of OXford` and State ofMaine, have invented certain .new and useful Improvements in Paper-BagAppel,No. 388,614,0f August 28, 1888) fromy continuous paper tubinghaving an inwardlyfolded tuck in each side thereof.

in the drawings accompanying this specification, wherein- Fig. 1 1s aside elevation of so much of a paper-bag machine as is necessary toillustrate my invention. Therein sundry small parts of frame, gears,&c., are broken away to better show parts that would otherwise beobscured. Fig. 2 is a plan view corresponding with the elevation of Fig.1, and in said plan the pasting mechanism is omitted in the interest ofclarity. Fig. 3 is a front end elevation, partly in section. The generalsection is taken on line a a of Fig. 1 and looking in the directionindicated by arrow A in that figure. A portion of the parts on thefoldingbed axis are also shown in section on line d d of Fig. 1. Fig. 4is a plan view of the pasting mechanism, and Fig'. 5 is a side elevationthereof with those parts of the shafts and framing below line b b ofFig. 4 removed. Figs. 6 and 7 are side and rear elevations,respectively, of a portion of the bottom-folding mechanism. Fig. 6 ispartially in section and which section is taken on line c c of Fif. 2and looking.' in the direction of arrow C. Figs. 8, 9, 10, and 11 are aseries of views illustrating the arts of the bottomforming mechanism int eir successive positions. Fis. 1 to 11, inclusive, are drawn to largerscales, respectively, than Fi s. 1 to 3, inclusive. Fig. 12 is a planview of a portion of the bottomfolding mechanism and corresponds inscale with Figs. 6 and 7.

The general plan followed in the operation of my improved machine is asfollows: By

6 7 in frames 2 3, respectively.

suitable means I first form three creases transverse the bag-blank andthrough all `the plies thereof and at about the same time sever abag-blank section from the tuckedpaper tube. The crease nearest theleading end of the bag-blank is at a distancefrom that end equal toaboutone-half the depth of a side tuck. The second crease is at a distancefrom the first crease equal to the depth of a side tuck, and the thirdcrease is an equal distance rearward of the second crease. -Continuing,I then grip iirst the leading end of the bag-blank, including all theplies and across the Whole width thereof at a point just in advance ofthe first crease; secondly, I grip the opposite lower plies of the sidetucks just 1 rearward of the second crease; thirdly, and One embodimentof my invention, andv which may be the preferred one, is illustratedV atabout the same time, I grip the opposite upper plies of the side tucksjust in advance of the second crease. Then by an upward and backwardmovement of the first and third mentioned gripping means I open out theside tucks, and then by a continued backward movement in connection witha downward movement thereof I fold the distended bottom over and downupon itself on the line of the third transverse crease, thus completingthe folding of the bottom.

The improved means which I have provided to perform the aforerecitedfunctions may be mounted in and upon main side frames 2 3 of suitableform, Figs. 1 and 2. At T is shown the delivery end of some suitabletube-forming mechanism, the forward end of which terminates in a float4, having the usual serrated frontedge. Directly above said iioat andhaving a serrated front edge a short distance rearward of the serratededge of the ioat is knife 5, suitably supported at Mounted upon shaft 8parallel with the direction of travel of the bag-tube is striker 9 forsevering in connection with float 4 and knife 5 the bag-tube intobag-blanksections. Frame 3 has a U-shaped opening therein at 390 toallow room for the rotation of the striker.

.Striker 9 is secured to shaft 8 by the usual IOO tively, through thetight one of which power may be communicated to the machine by means ofthe usual belt. The machine may be provided with the usual slidingbelt-shifter 20. Shaft 11 has fixed thereon gear 18, which through idlegear 19 drives lower feedroll gear 21 and thence upper feed-roll gear22. Feed-rolls 23 24 are mounted upon shafts 25 26, respectively, andwhich shafts are mounted for rotation in brackets 14 15. Said shaftshave also fixed thereon gears 21 22l respectively.

Directly succeeding the severing mechanism is an adjustable table 27,supported by any convenient means for receiving the bag-tube andassisting its leading end into engagement with creaser-rolls 29 30. Saidcreaser-rolls are mounted upon shafts 31 32, respectively, Figs. 1, 2,and 5, said shafts having their bearings in brackets 33 34, upstandingfrom frames 2 3, respectively. Roll 29 is driven from gear 21 throughidle gear 28, which meshes with gear 35 on shaft 31 of said roll 29.Roll 30 is driven from gear 35, which meshes with gear 36 on shaft 32 ofsaid roll 30. Rolls 29 30 are provided with three pairs of creasers,roll 29 having therein creaser-groove 37, creaser-blade 39, andcreaser-groove 41 for coaction, respectively, with creaser-blade 38,creaser-groove 40, and creaser-blade 42 of roll 30. Said rolls may alsobe provided, if desired, with a slacking device, indicated in a generalway by 43 44, to assist the tube-severing means in its operation. InFigs. 1, 2, 4, and 5 creasers 41 42 are illustrated as mounted in saidslacking device, or said slacking device may be omitted and creasers 4142 mounted directly in rolls 29 30, respectively, as shown in Figs. 8 to11, inclusive. Roll 30 is also provided with a pasting-blade 45, securedin a suitable cavity 47 therein by means of screws 46.

Gn shaft 32 near bracket 34 is fixed gear 48, which meshes with gear 111of the pasting device and whereby said pasting device is actuated. Thepasting device, Figs. 4 and 5, is mounted upon posts 102 103 of brackets52 53, respectively. Paste-transfer bar 101 is supported in arms 104 105on shaft 106, which shaft is mounted for rotation in brackets 108 109,and which brackets are secured to posts 102 103, respectively, by bolts,as 107. Said bolts are also efficient to hold the respective ends ofbridge 110 to posts 102 103. Shaft 106, which carries paste-transfer bar101, has also fixed thereto gear 111 and through which gear the pastingdevice is actuated from gear 48, as hereinbefore stated. The usualpaste-reservoir 112 is mounted upon bridge 110 and secured thereto bybolts, as 113. Said reservoir is provided with a discharge-roll 11.4,pivotally mounted on shaft 115 in brackets 116 117 on said reservoir.Reservoir 112 is provided with an adjustable mouthpiece'comprising shaft118,

flattened at 119 and governed in its movement by lever 120, pinnedthereto. Said lever may be locked in adjustment against the base ofreservoir 112 by means of clampscrew 121. Means for rotating roll 114intermittently are as follows: On roll-shaft 115 is fixed ratchet 122,and adjacent thereto and turning freely on said shaft is rock-arm 123.At one end of said rock-arm is pivoted pawl 124 for engagement with saidratchet, and at the other end of said arm is pivoted pitman 125. Saidpitman is adjustably screwed into strap 126 of eccentric 127. Saideccentric is mounted upon and fast to shaft 106. By the rotation of saideccentric arm 123 may be rocked, and through pawl 124 and ratchet 122 astep-by-step rotary movement may be imparted to roll 114. For eachrotative step of roll 114 paste-transfer bar 101 makes one revolutionabout shaft 106 and wipes from said roll a portion of paste for deliveryonto pasting-blade 45 of roll 30.

On shaft 31 and at the front end thereof, Fig. 1, is adjustably fixedgear 50 and from which gear the bottom-forming part of the machine isdriven. Said gear is secured for rotation with shaft 31 by means ofbolts 49, which bolts pass through gears 35 and 50 and in coaction withnuts 51 hold said gears securely together. The bolt-holes in gear 50 areslotted, as at 54, for adjustment.

` In brackets 52 53, Fig. 3, upstanding on frames 2 3, respectively, aresleeves 55 56, having flanges 57 58, respectively, and by which flangessaid sleeves are secured by bolts, as 59, to their respective brackets.In said sleeves are provided bearings for shaft 60. On this shaft ismounted revoluble carrier 61, Vhaving thereon one or more foldingbeds,as 62 63, Figs. 1, 2, and3. Said folding-beds are provided with theusual side clips, as 66 67, having rolls 68 69 thereon, respectively,for engagement with fixed cams 64 65, respectively, for opening saidclips. The clips may be closed by the usual springs. (Not shown.) Fixedcams 64 65 are supported on the inner ends of sleeves 55 56,respectively, and secured thereto by set-screws, as 70. On that end ofshaft 60 nearer the observer in Fig. 1 is keyed gear 71. Said gear isdriven from gear 50 on shaft 31 through idle gear 72. Gear 71 mesheswith gear 73 on shaft 74, and between brackets 52 53 on said shaft arefixed gears 76 77, which through idle gears 78 7 9, respectively, drivegears 80 81, keyed to the sleeve-like hubs of cams 82 83, respectively,and whereby said cams are driven in a direction opposite to thedirection of rotation of gear 71 and folding-bed carrier 61 and at arotative speed as many times greater than that of the gear and carrieras that carrier has folding-beds, which in the present instance isthree. Cam 84 is also keyed to the hub of cam 82 and revolves therewith.

IOO

IIO

IIS

ISO

On the outboard end of cam-shaft 85, Figs. 1 and 3, is secured gear 86,and which gear is driven from gear 71 through idle gear 87. Said gear 86is driven in the same direction as gear 71, but at three times therotative speed thereof. Oppositely disposed for oscillation on sleeves55 56 and situated between cams 64 82 and 65 83 are rock-arms 88 89, allrespectively. Said rock-arms are each of bellcrank shape, one member ofeach, as 880, reaching upwardly and one member of each, as 808, reachingrearwardly. Upper members 880 and 890 have formed therein suitablebearings in which uprights 90 91, respectively, offolding device Fslide. Pivotally connected to the free ends of rear members 808 809 ofrock-arms 88 89 are upper ends 94 95, allrespectively, of yoke 92. Thelower end of yoke 92 is bifurcated at 93 for sliding guidance on shaft85. On said shaft is fastened cam 96, and yoke 92 is provided with aroll 97 for engagement therewith. By the rotation of cam 96 yoke 92 maybe reciprocated vertically and arms 88 89 rocked on sleeves 55 56,respectively. Said roll 97 is mounted on stud 98, and which stud isadjustably secured in a suitable slot in yoke 92 by means of nut 99. The bifurcated end 93 of yoke 92 is prevented from movement lengthwise ofshaft 85 by means of cam 96 on one side and collar 100 on the other sideThe bottom-folding device (indicated in a general way by F best shown inFigs. 6, 7, and 12) is mounted upon uprights 90 91, which uprights areslidably mounted in the upward-reaching members 880 890 of rockarms 8889, respectively. Said uprights may be actuated up and down in unison bymeans of rolls 142 143 thereon in engagement with cams 82 83, turningupon sleeves 55 56, all respeetively. Near their upper ends saiduprights are provided with inreaching brackets 144 145, respectively, towhich the opposite ends of folding-plate 150 are secured by suitablemeans, such as screws 141. Said folding-plate is movable toward and awayfrom the successive folding-beds, as 62 63, and in approximateparallelism or at a constant angle therewith by means of the upward anddownward movement of uprights 90 91, and said folding-plate isoscillatable forwardly and backwardly in space,but always backwardlywith respect of those successive folding beds, by means of theoscillation of rock-arms 88 89 about shaft 60 as an axis. By these meanssaid folding-plate is caused to move during its coaction with thefoldingbed in the arc of a circle withrespect ofthat folding-bed-thatis, any given line across said folding-plate-as, for instance, the lineof its forward edge 1500-rotates about a corresponding line across thefolding-bed as an axis, as in the case of said front edge 1500 about theline through the forward edges of side clips 66 67 when those clips arein their closed positions. Folding-plate 150 is provided with the usualside clips 146 147, pivotally mounted on ears, as 149, extendinginwardly from uprights 90 91, respectively. Plate 150 is cut away at theends thereof to allow room for the access of saidside clips thereunder.Fivotally mounted in ears, as 151, on said uprights 90 91 are rock-arms154 155, the upper members of which are linked to side clips 146 147 bylinks 156 157 and the lower members of which bear rolls 158 159, allrespectively. Said rolls are for engagement with cams 162 163,respectively, for opening side clips 146 147. Said cams 162 163 aremounted upon and revolve with cams 82 83, respectively, and which camsmake one revolution in coaction with each successive folding-bed. Saidside clips are closed by means of spring 148, the opposite ends of whichare attached to the opposite side clips, respectively. In brackets 164165, attached by screws, as 161, to uprights 90 91, respectively, isrock-shaft 1 60, and fixed to said shaft 160 adjacent to said bracketsand reaching over to edge 1500 of folding-plate 150 are arms 166 167,respectively. Said arms are slotted in their free ends at 172 173 forthe reception of opposite ends,respectively, of gripper-bar 170. Theends of said gripper-bar are retained in said slots and angled face 1701and working edge 1700 thereof urged to engagement with edge 1500 ofplate 150 by means of springs 168 169 on said arms, all respectively.Shaft 160 is provided with an arm 171, having a roll 174 at the free endthereof for engagement with cam 84 for rocking gripper-bar 170 up anddown with respect of folding-plate 150. Said roll 174 is urged toengagement with said cam by means of springs 176 177 on opposite ends ofshaft 160. One end of spring 176 is fast to bracket 164 and the otherend thereof hooked over arm 171 on said shaft 160. One end of spring 177 is attached to arm 165, and the other end thereof is attached tocollar 181 on said shaft 160.

The ironing and delivery mechanism is as follows: Rearwardly reachingand bolted to brackets 52 53 are brackets 152 153, respectively. Onshaft 128, mounted in boxes 129 in said brackets 152 153, and whichboxes are preferably yieldable, is ironing-roll 130. Said roll coactswith successive folding-beds on carrier 61 to roll down the gummedseal-flap onto the bag-bottom and to roll down and flatten the foldedbag bottom. On rollshaft 128 is gear 131, meshing with gear 71, andwhereby roll 130 is driven. Below roll 130 is a pair of discharge-rolls132 133. Roll 132 is driven from gear 134 on shaft 128, through idlegear 135, which engages gear 136 on delivery-roll shaft 137. Lowerdeliveryroll 133 is driven from gear 136, which meshes with gear 138 onlower delivery-roll shaft 139. The completed paper bag is guided intothe grip of rolls 132 133 by deiiecting-apron 140.

IOO

My invention is also applicable to a paperbag machine having areciprocating instead of a rotating folding-bed and in which casefolding-plate 150 would reciprocate in parallelism therewith and riseand fall as illustrated in the drawings. Also it is obvious that myinvention is applicable to a paperbag machine having a stationaryfolding-bed either curved or flat.

The operation of my improved machine is as follows: Suitable tuckedpapertubing being supplied to the machine by the delivery end T of thetube-forming mechanism, Figs. 1 and 2, said tube is fed forward by rolls23 24 past the serrated edges of float 4 and blade 5 and thence overtable 27 and into the grip of rolls 29 30, Fig. 5. By means ofpasting-blade 45 in roll 30 paste is applied across the forward end ofthe bag-tube, and by ereasers 37 38 in said rolls 29 30, respectively,said bag-tube is creased just rearward of said pasted portion. By thecontinued revolution of rolls 29 30 the bag-tube has two more transversecreases formed therein by creasers 39 40 and 41 42, respectively. Theselast ereasers are preferably mounted in some suitable slacking device,as 4.3 44, and while in the grip of said slacker the bag-tube has abag-blank portion bb severed therefrom by striker 9 in coaction withfloat 4 and knife 5. The pasted, creased, and severed bag-blank is thenfed forward by the continued rotation of rolls 29 30 onto one of thefoldingbeds, as 63, of carrier 61 and under foldingplate 150, hoveringthereover, Fig. 8. At this time roll 174 of arm 171 on rock-shaft 160has reached a low part of cam 84, and gripper-bar 17 0 has thereforebeen swung below the face of folding-bed 63 and just forward thereof indepressed portion 178 of carrier 61. The forward end of the bag-blanktherefore passes over said bar 170. Side clips 66 67 then grip the lowerplies of opposite side tucks, respectively, of the bag-blank to thefolding-bed, and directly thereafter or simultaneousl y therewith sideclips 146 147 grip the upper plies of said side tucks, respectively, tothe under side of folding-plate 150. The side clips of the folding-bedgrip the blank thereto just rearward of the middle transverse crease insaid blank, and the side clips of the folding-plate grip the blank tosaid plate just forward of that middle crease in the blank. The machineat this stage of its operation is shown in Fig. 8 of the drawings. Roll174 of arm 171 on rock-shaft 16() is now just about to rise toward highpart 840 of cam 84 as that cam continues its anticlockwise rotationabout aXis 60. This upward movement of said roll causes gripper-bar 170to be moved upwardly, and the flat angled face 1701 thereof bendsupwardly the forward end of the bag-blank, and thereafter edge 170() ofthat gripper-bar grips said blank on the line of its forward crease toedge 1500 of foldingplate 150. Said gripper-baris thereby thrustbackward a slight amount in slots 172 17 3 of arms 166 167 against thepressure of springs 168 169, all respectively. During this movement ofgripper-bar 170 foldingplate 150 has started on its upward movement todistend the side tucks, and saidplate then commences a correspondingslowing down in its forward movement. Throughout the remainder of saidforward movement of folding-plate 15() that plate and gripper-bar 170maintain the same positions in relation to each other, Figs. 9 and 10.Folding-plate 150 continues its upward movement and continues todecrease its rate of forward movement, thereby allowing folding-bed 63to run ahead of it. Said plate continues to so move through the positionof Fig. 9 and nearly to that of Fig. 1() and at which last point saidplate has reached its highest position relative to the folding-bed.Still continuing its decreased rate of forward movement, said plate nowcommences to move downwardly, Fig. 10. The upward and downward movement,on the one hand, and the retarded forward movement, on the other hand,both relative to the folding-bed, are so timed in their relation to oneanother as to always maintain the same distance between edge 1500 of thefolding-plate and the forward edges of the lower side clips,whereby thesides of the bag-bottom are held taut during the formation of the sidefolds of the bottom. In other words, the path of edge 1500 of plate 150conforms to an arc of a circle whose center is coincident with a linethrough the forward edges of side clips 66 67, respectively, as thoughthat edge 1500 was pivoted in line with the forward edges of those sideclips. Folding-plate 150 continues its downward and retarded forwardmovement from the position of Fig. 10 to the position of Fig. 11, inwhich latter position the folding-plate side clips have been swung outof operation, the folding-plate has completed its forward movement, andgripper-bar 170 has moved upwardly from engagement with edge 1500 of thefolding-plate, thus freeing the folded bag-bottom from engagement withthe folding-plate and its appurtenances. Said folded bag is stillgripped by side clips 66 67 to the folding-bed and is thereby carriedunder ironer-roll 130. When the leading end of the bag is well undersaid roll, side clips 66 67 release their hold thereon, and the pastedflap of the bag-bottom is pressed down upon that bottom and the bagironed into its final form. The finished bag then moves overdeflectingapron 14() and into the grip of delivery-rolls 132 133, bywhich it is delivered to some suitable drying` device. (Not shown.)

I claim- 1. The combination of a revoluble foldingbed, a folding-plateabove the folding-bed, side clips on each, means for operating the sideclips, means for gripping a bag-blank to IOO IIO

the forward edge of the folding-plate, means for oscillating thefolding-plate about the a-Xis of the folding-bed with the face of thefolding-plate in substantial parallelism with the folding-bed, and meansto move the foldingplate up and down with respect of the folding-bed incoaction with the oscillation of said folding-plate.

2. rlhe combination of a folding-bed, afolding-plate above thefolding-bed, side clips on each, means for operating the side clips, agripper-bar yieldably supported on the folding-plate, means for movingthe gripper-bar up and down with respect of the foldingplate and incoaction with the forward edge thereof, means for moving thefolding-plate up and down and backward with respect of the folding-bedwhile maintaining the forward edge of said folding-plate at a constantdisltance from a given line across the foldingbec 3. The combination ofa revoluble foldingbed 63, a folding-plate 150 above the foldingbed andoscillatable about the axis thereof, side clips on the folding-bed andon the folding-plate, means for operating the side clips, a gripper-bar170 oscillatable up and down with respect of the folding-plate, means tocscillate the gripper-bar and means for moving the folding-plate in thearc of a circle with respect of the folding-bed.

4. The combination of a folding-bed, afolding-plate above thefolding-bed, side clips on each, means for operating tlieside clips, agripper-bar pivotally mounted on the folding-plate for engagement withthe forward edge thereof, means for moving the gripperbar up and downwith respect of the foldingplate and means for moving the folding-plateup and down and backward with respect of the folding-bed and with theface of the folding-plate in substantial parallelism therewith and withthe forward edge of the foldinging the side clips on the folding-bed andon the folding-plate, means for gripping the bagblank to the forwardedge of the folding-plate and means for moving the folding-platebackward and upward and then backward and downward with respect of thefolding-bed and with the face of the folding-platein substantialparallelism therewith, and with the forward edge of the folding-platealways at a predetermined distance from a given line across thefolding-bed.

6. The combination of a folding-bed, means to grip the lower plies of abag-blank thereto, a folding-plate above the folding-bed and means togrip the upper plies of a bag-blank thereto, means to grip the bag-blankto the forward edge of the folding-plate and means to move thefolding-'plate backward with respect to the folding-bed whilemaintaining a substantiallyT equal distance between the forward edge ofthe folding-plate and a given line across the folding-bed, all combinedand operating together substantially as described.

7. The combination of a folding-bed, means to grip the lower plies of abag-blank thereto, a folding-plate above the folding-bed, means to gripthe upper plies of a bag-blank thereto, means to grip the bag-blank tothe forward portion of the folding-plate and means to cause thefolding-plate to travel in the arc of a circle with respect of thefolding-bed all combined and operating together substantiallyT asdescribed` 8. The combination of a folding-bed, a folding-plate abovethe folding-bed, oppositelydisposed side clips on each, means foroperating the side clips, means for gripping a bagblank to the forwardportion of the foldingplate and means for moving the folding-plate tocause its front edge to travel in the arc of a circle about a given lineacross the foldingbed as an aXis while maintaining the face of thefolding-plate at a constant angle with the folding-bed.

FREDERICK E. STRASBURG.

Vitnesses:

THos. HAWLEY, HAROLD SMITHWIGK.

